US11205931B2 - Electric machine and rotor with cooling channel - Google Patents

Electric machine and rotor with cooling channel Download PDF

Info

Publication number
US11205931B2
US11205931B2 US16/468,879 US201716468879A US11205931B2 US 11205931 B2 US11205931 B2 US 11205931B2 US 201716468879 A US201716468879 A US 201716468879A US 11205931 B2 US11205931 B2 US 11205931B2
Authority
US
United States
Prior art keywords
rotor
filler body
rotor core
laminated
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US16/468,879
Other languages
English (en)
Other versions
US20190356187A1 (en
Inventor
Holger Fröhlich
Isao Fukumoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vitesco Technologies GmbH
Original Assignee
Vitesco Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vitesco Technologies GmbH filed Critical Vitesco Technologies GmbH
Assigned to CPT GROUP GMBH reassignment CPT GROUP GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUKUMOTO, ISAO, Fröhlich, Holger
Publication of US20190356187A1 publication Critical patent/US20190356187A1/en
Assigned to Vitesco Technologies GmbH reassignment Vitesco Technologies GmbH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CPT GROUP GMBH
Application granted granted Critical
Publication of US11205931B2 publication Critical patent/US11205931B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/165—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors characterised by the squirrel-cage or other short-circuited windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/20—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having deep-bar rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/06—Cast metal casings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means

Definitions

  • the present disclosure relates to electric machines.
  • Various embodiments may include rotors for an electric machine.
  • the rotor In electric machines of all power classes, a considerable amount of heat is generated, which, with regard to improved machine efficiency and with regard to a longer service life of the electric machine, must be dissipated by means of cooling technology measures.
  • the rotor normally generates heat losses, which are partially transmitted by heat conduction and radiation across an air gap between the rotor and a stator of the electric machine and are released from there to a housing of the electric machine. A further part of the heat losses may be conducted to the outside via the rotor shaft, as a result of which the rolling bearings of the rotor shaft warm up.
  • cooling of the rotor shaft or of the laminated rotor core is possible, this can have direct positive effects on the operating characteristics of the electric machine and on the service life of the bearing arrangement. Cooling of the laminated rotor core may also make a major contribution to the cooling of the rotor shaft. By means of cooling of the rotor shaft, a reduction of the large temperature differences between the inner ring and the outer ring of the respective bearing can be attained, and thus the service life of the bearings can be lengthened.
  • the shaft has a cavity which extends in an axial direction of the shaft.
  • the cavity is for receiving a refrigerant.
  • the shaft comprises an evaporator unit, which is arranged within the rotor, and a condenser unit, which is arranged outside the rotor.
  • the condenser unit is provided for condensing the refrigerant.
  • an electric machine furthermore has a casing liquid-type cooling arrangement of closed design (encapsulated)
  • the problem may arise that the rotor and the winding heads remain virtually without cooling, whereby the performance of the electric machine is restricted and there is the risk of the bearings of the rotor shaft failing owing to the temperatures.
  • the teachings of the present disclosure describe a rotor for an electric machine with a relatively low mass moment of inertia. Cooling of the rotor is made possible, such that an average bearing temperature and a temperature difference between a bearing inner ring and a bearing outer ring can be lowered in order to attain a longer service life and in order to prevent failures owing to material fatigue.
  • some embodiments include a rotor ( 1 ) for an electric machine, the rotor ( 1 ) comprising a laminated rotor core ( 6 ), a filler body ( 5 ) composed of an aluminum die-cast alloy, which is cast onto the laminated rotor core ( 6 ), a first shaft journal ( 3 ) with at least one air inlet opening ( 19 ), a second shaft journal ( 4 ) with at least one air outlet opening ( 20 ), and a ventilation unit ( 18 ; 36 , 37 ; 40 ; 60 ), wherein the filler body ( 5 ) connects the laminated rotor core ( 6 ) rotationally conjointly to the first shaft journal ( 3 ) and to the second shaft journal ( 4 ), the laminated rotor core ( 6 ) has a central axial bore ( 11 ) which is partially filled by the filler body ( 5 ) such that an axial cooling channel ( 16 ) for cooling air is formed within the central bore ( 11 ) of the laminated rotor core ( 6 ),
  • the rotor ( 1 ) is suitable for an electric machine in the form of a synchronous motor
  • the laminated rotor core ( 6 ) forms receiving channels ( 28 ) within which permanent magnets ( 29 ) are received, and free spaces between the permanent magnets ( 29 ) and the receiving channels ( 28 ) are filled by the filler body ( 5 ) such that the permanent magnets ( 29 ) are fixed within the receiving channels ( 28 ) by means of the filler body ( 5 ).
  • the rotor ( 1 ) is suitable for an electric machine in the form of an asynchronous motor, the rotor ( 1 ) furthermore comprising a first short-circuiting ring ( 31 ) composed of an aluminum die-cast alloy, which is cast onto the laminated rotor core ( 6 ), a second short-circuiting ring ( 32 ) composed of an aluminum die-cast alloy, which is cast onto the laminated rotor core ( 6 ), and multiple short-circuiting bars ( 33 ) composed of an aluminum die-cast alloy, which is cast into axial grooves ( 34 ) of an outer shell surface ( 35 ) of the laminated rotor core ( 6 ) such that the short-circuiting bars ( 33 ) are connected in each case to the first short-circuiting ring ( 31 ) and to the second short-circuiting ring ( 32 ).
  • the ventilation unit ( 18 ) comprises a conveying spiral ( 18 ), a drive shaft ( 21 ) of the conveying spiral ( 18 ) is mounted rotationally conjointly within the first shaft journal ( 3 ) and the second shaft journal ( 4 ), and the conveying spiral ( 18 ) is arranged within the axial cooling channel ( 16 ).
  • the ventilation unit ( 36 , 37 ) comprises fan impeller blades ( 36 , 37 ) which are integrated into the shaft journals.
  • the ventilation unit ( 40 ) comprises an axial fan impeller insert ( 40 ), the axial fan impeller insert ( 40 ) is connected rotationally conjointly in positively locking fashion to the filler body ( 5 ), and the axial fan impeller insert ( 40 ) is arranged within the axial cooling channel ( 16 ).
  • multiple fin-like first projections ( 17 ) project radially inward from an inner shell surface ( 9 ) of the filler body ( 5 ), and wherein the shaft journals ( 3 , 4 ) are fastened by fastening means ( 27 ) to second fin-like projections ( 22 ) of the filler body ( 5 ), wherein the second fin-like projections ( 22 ) likewise project radially inward from the inner shell surface ( 15 ) of the main body ( 5 ).
  • an inner shell surface ( 9 ) of the filler body ( 5 ) forms in each case one centering shoulder ( 9 a , 9 b ) for the first shaft journal ( 3 ) and for the second shaft journal ( 4 ).
  • the laminated rotor core ( 6 ) is connected to the filler body ( 5 ) in positively locking and non-positively locking fashion in the axial direction (L).
  • some embodiments include an electric machine ( 42 ) for a vehicle, the electric machine ( 42 ) comprising: a rotor ( 1 ) as described above, wherein the rotor ( 1 ) has a rotor shaft ( 2 ) mounted in two rolling bearings ( 45 , 46 ), a stator ( 48 ) having a laminated stator core ( 49 ) and having stator winding heads ( 50 , 51 ) which are arranged at opposite end sides of the laminated stator core ( 49 ), and a housing ( 43 ) which surrounds the stator ( 48 ) in a radial direction, wherein the stator ( 48 ) and the housing ( 43 ) form, between them, an outer cooling channel ( 52 ) which runs along the laminated stator core ( 49 ) and the stator winding heads ( 50 , 51 ) and which connects two opposite end sides of the stator winding heads ( 50 , 51 ) to one another, the ventilation unit ( 60 ) of the rotor ( 1 ) is
  • FIG. 1 is a longitudinal sectional illustration of an exemplary embodiment of a rotor incorporating the teachings of the present disclosure
  • FIG. 2 is a longitudinal three-quarter sectional illustration of a further exemplary embodiment of a rotor incorporating the teachings of the present disclosure for an electric machine in the form of a synchronous motor,
  • FIG. 3 is a perspective exploded illustration of the rotor as shown in FIG. 2 ;
  • FIG. 4 is a cross-sectional illustration of the rotor as shown in FIG. 2 ;
  • FIG. 5 is a perspective exploded illustration of a further exemplary embodiment of a rotor incorporating the teachings of the present disclosure for an electric machine in the form of an asynchronous motor
  • FIG. 6 is a cross-sectional illustration of the rotor as shown in FIG. 5 ;
  • FIG. 7 is a perspective exploded illustration of a further exemplary embodiment of a rotor incorporating the teachings of the present disclosure for an electric machine in the form of an asynchronous motor;
  • FIG. 8 is a cross-sectional illustration of the rotor as shown in FIG. 7 ;
  • FIG. 9 is a schematic longitudinal sectional illustration of an electric machine.
  • a rotor for an electric machine comprises a laminated rotor core, a filler body composed of an aluminum die-cast alloy, which is cast onto the laminated rotor core, a first shaft journal with at least one air inlet opening, a second shaft journal with at least one air outlet opening, and a ventilation unit.
  • the filler body connects the laminated rotor core rotationally conjointly to the first shaft journal and to the second shaft journal.
  • the laminated rotor core has a central axial bore which is partially filled by the filler body such that an axial cooling channel for cooling air is formed within the central bore of the laminated rotor core.
  • the shaft journals furthermore drive the ventilation unit, and the ventilation unit is designed to draw an air stream in via the air inlet opening, convey said air stream through the axial cooling channel, and discharge said air stream via the air outlet opening.
  • the axial cooling channel and the ventilation unit permit active open-circuit ventilation of the rotor, wherein a circulating air stream or an aerosol stream can be generated which is in particular guided along within the rotor and can also cool winding head spaces of an electric machine within which the rotor may be installed.
  • the filler body transmits torques between the shaft journals and the laminated rotor core.
  • the filler body may be cast onto the laminated rotor core in such a way that the filler body is connected to the laminated rotor core in positively locking fashion.
  • the shaft journals may be connected to the filler body in positively locking and non-positively locking fashion. In this way, a shaft-hub connection can be realized by positive locking and non-positive locking of the shaft journals by means of the cast-on filler bodies. It is furthermore advantageous that a continuous shaft can be dispensed with, and instead a transmissible torque can be ensured by means of the two shaft journals.
  • the rotors described herein may be distinguished by a particularly low rotational mass moment of inertia.
  • the particularly low weight of the rotor is of value for the drive efficiency since the squirrel-cage rotor is a rotating component; this is because the rotational mass moment of inertia of the rotor can be lowered by at least 10% with this design. This factor provides important advantages in respect of efficiency for the operating behavior.
  • the rotor may have an architecture with which the laminated core cross section can be limited to an actively magnetic flux-directing laminated core cross section, as a result of which a significant reduction in the weight of the squirrel-cage rotor and a reduction in the mass moment of inertia of said squirrel-cage rotor are possible.
  • a diameter of the central axial bore within the laminated rotor core may be selected to be particularly large.
  • an active filler material of a lamination blank between a rotor shaft and active lamination material of the laminated rotor core can be dispensed with.
  • the region of the formerly inactive lamination zone can also be at least partially filled with a melt, in particular with a light-metal alloy, for example with a die-cast aluminum alloy, as a result of which the filler body is formed.
  • a light-metal alloy for example with a die-cast aluminum alloy
  • the filler body can be cast on and, at the same time, permanent magnets can be fixed.
  • permanent magnets for the fixing of the permanent magnets, special channels may be provided in the lamination of the core. It is likewise possible in the case of synchronous motors for a rotor carrier to be arranged (extruded profile) in the region of the formerly inactive lamination zone.
  • the rotor is suitable for an electric machine in the form of a synchronous motor.
  • the laminated rotor core forms receiving channels within which permanent magnets are received, wherein free spaces between the permanent magnets and the receiving channels are filled by the filler body such that the permanent magnets are fixed within the receiving channels by means of the filler body.
  • the rotor is suitable for an electric machine in the form of an asynchronous motor.
  • the rotor furthermore comprises a first short-circuiting ring, a second short-circuiting ring and multiple short-circuiting bars.
  • the first short-circuiting ring is composed of an aluminum die-cast alloy, which is cast onto the laminated rotor core.
  • the second short-circuiting ring is likewise composed of an aluminum die-cast alloy, which is cast onto the laminated rotor core.
  • the multiple short-circuiting bars are composed of an aluminum die-cast alloy, which is cast into axial grooves of an outer shell surface of the laminated rotor core such that the short-circuiting bars are connected in each case to the first short-circuiting ring and to the second short-circuiting ring.
  • a laminated rotor core can be stacked, wherein the laminated rotor core is provided with cavities or grooves for the short-circuiting bars.
  • the grooves in the laminated rotor core form channels, wherein a die-casting device can be placed at an end of the laminated rotor core and the channels can be filled with a melt of the aluminum die-cast alloy, for example through a passage (in the die-casting device), wherein the channels filled with solidified melt form the short-circuiting bars of the squirrel-cage rotor.
  • the casting-on of the aluminium die-cast alloy may be performed such that the short-circuiting bars and the short-circuiting rings are not mechanically and electrically connected to the filler body.
  • the aluminum die-cast alloy which is used for producing the short-circuiting bars may be furthermore the same aluminum die-cast alloy as is used for producing the first short-circuiting ring and the second short-circuiting ring and for producing the filler body.
  • such embodiments permit a high degree of functional integration, that is to say the production of a positively locking and non-positively locking connection to the shaft journals and also the reduction in weight and reduction in costs in the production of the hybrid components of the rotor.
  • a reduction in costs is provided owing to the possibility of producing the individual elements of the rotor in segmented design so as to optimize costs.
  • the ventilation unit comprises a conveying spiral, wherein a drive shaft of the conveying spiral is mounted rotationally conjointly within the first shaft journal and within the second shaft journal, and the conveying spiral is arranged within the axial cooling channel.
  • the ventilation unit may comprise fan impeller blades integrated into the shaft journals.
  • the ventilation unit may comprise an axial fan impeller insert, wherein the axial fan impeller insert is connected rotationally conjointly in positively locking fashion to the filler body, and the axial fan impeller insert is arranged within the axial cooling channel.
  • first projections project radially inward from an inner shell surface of the filler body, whereby the shaft journals are fastened by fastening means to fin-like second projections of the filler body, wherein the second fin-like projections likewise project radially inward from the inner shell surface of the main body.
  • the first projections may serve as cooling fins with an increased heat transfer area and may contribute to improved cooling of the rotor carrier and thus also of the lightweight rotor.
  • the second projections may be wider in cross section than the first projections, in order to permit a particularly durable fastening of the filler body to the shaft journals.
  • the second projections are arranged in a circumferential direction between the first projections, which is particularly space-saving.
  • the inner shell surface of the filler body may form in each case one centering shoulder for the first shaft journal and for the second shaft journal.
  • the centering shoulders permit a particularly straightforward orientation of the shaft journals on the filler body, whereby the assembly of the rotor is facilitated.
  • the laminated rotor core may be connected to the filler body in positively locking and non-positively locking fashion in the axial direction.
  • the filler body may perform a clamp function for the individual laminations of the laminated rotor core.
  • the filler body may be cast onto the laminated rotor core in such a way that the laminated rotor core is accommodated in a circumferential recess in the filler body, wherein end portions of the filler body which delimit the recess prevent displacement of the laminated rotor core in the axial direction and may hold together/clamp the laminated rotor core in non-positively locking fashion in the axial direction.
  • an electric machine comprises a rotor as described above with a rotor shaft mounted in two rolling bearings, said rotor shaft having a first shaft journal and having a second shaft journal. Furthermore, the electric machine comprises a stator, with a laminated stator core and with stator winding heads which are arranged at opposite end sides of the laminated stator core, and a housing, which surrounds the stator in a radial direction. The stator and the housing form, between them, at least one outer cooling channel which runs along the laminated stator core and the stator winding heads and which connects two opposite end sides of the stator winding heads to one another.
  • the ventilation unit of the rotor forms a suction side on a first end side of the laminated rotor core of the rotor, and a pressure side on a second end side of the laminated rotor core, as the rotor shaft rotates, such that air is drawn in on the suction side and conveyed through the axial cooling channel of the rotor and the outer cooling channel.
  • the housing comprises a liquid cooling channel of a circulation cooling circuit, within which a cooling liquid circulates and cools the housing.
  • the electric machine may include a rotor which is subjected to active open-circuit ventilation with air and to provide an indirect connection of a corresponding rotor cooling arrangement to a liquid-cooled housing, in order to thereby permit an improvement in the cooling of the rotor, of the winding heads and in particular of the rolling bearings of the rotor.
  • a rotor which is subjected to active open-circuit ventilation with air and to provide an indirect connection of a corresponding rotor cooling arrangement to a liquid-cooled housing, in order to thereby permit an improvement in the cooling of the rotor, of the winding heads and in particular of the rolling bearings of the rotor.
  • the rotor comprises in particular the ventilation unit described further above in conjunction with the rotor according to the invention.
  • the stator and the housing form, between them, one or more outer cooling channels which run(s) along the laminated stator core and the winding heads and which connect(s) two opposite end sides of the stator winding heads to one another.
  • the at least one outer cooling channel may be delimited in a radial direction by an outer shell surface of the stator at one side and by an inner wall, situated opposite the shell surface, of the housing at the other side.
  • the outer cooling channel may be formed by an intermediate space between housing, stator and stator winding heads.
  • the outer cooling channel In an axial direction, that is to say in a longitudinal direction of the stator, the outer cooling channel extends along the entire stator and the stator winding heads. Furthermore, the outer cooling channel may run in spiral fashion along the entire circumference of the stator.
  • the ventilation unit is designed to form a suction side on a first end side of the laminated rotor core, and a pressure side on a second end side of the laminated rotor core, as the rotor or laminated rotor core rotates, such that air is drawn in on the suction side from the at least one cooling channel and conveyed through the axial cooling channel of the rotor and the outer cooling channel or the outer cooling channels, wherein the stator winding heads are passed and cooled.
  • the circulation cooling circuit may have a pump and a heat exchanger for cooling the cooling liquid.
  • the pump may draw in the cooling liquid from the region of the liquid cooling channel of the housing and convey said cooling liquid through the heat exchanger, where said cooling liquid is cooled by means of a second cooling medium, for example by means of cooling water of a main cooling circuit, and subsequently convey said cooling liquid back into the liquid cooling channel of the housing.
  • FIG. 1 shows a rotor 1 with a rotor shaft 2 , wherein the rotor shaft 2 comprises a first shaft journal 3 and a second shaft journal 4 .
  • the rotor 1 furthermore comprises a cast filling or filler body 5 composed of an aluminum die-cast alloy and a laminated rotor core 6 .
  • the filler body 5 is cast onto the laminated rotor core 6 and connected to the laminated rotor core 6 , for example in positively locking fashion, such that the filler body 5 and the laminated rotor core 6 are connected rotationally conjointly to one another. Therefore, a torque can be transmitted from the filler body 5 to the laminated rotor core 6 , and vice versa.
  • a rotational movement of the filler body 5 about a longitudinal axis L of the rotor 1 can be transmitted to the laminated rotor core 6 , so that the laminated rotor core 6 also rotates about the longitudinal axis L.
  • the filler body 5 is substantially of cylindrical configuration and has an annular cross section.
  • the first shaft journal 3 has a first centering collar 7 at its end illustrated on the right in FIG. 1
  • the second shaft journal 4 has a second centering collar 8 at its end illustrated on the left in FIG. 1 .
  • An inner shell surface 9 of the filler body 5 forms, in its axial end regions, in each case one centering shoulder 9 a , 9 b for the first centering collar 7 of the first shaft journal and for the second centering collar 8 of the second shaft journal 4 .
  • the first centering collar 7 is inserted into the first centering shoulder 9 a
  • the second centering collar 8 is inserted into the second centering shoulder 9 b .
  • the shaft journals 3 , 4 are oriented with respect to the filler body 5 , wherein a longitudinal axis L of the shaft journals 3 , 4 corresponds to a longitudinal axis L of the filler body 5 .
  • the filler body 5 forms, on its outer circumference, a recess 10 which extends over a large region of the outer circumference.
  • the filler body 5 is cast onto the laminated rotor core 6 , such that the recess 10 of the filler body corresponds to a central bore 11 of the laminated rotor core 6 .
  • the recess 10 is delimited in the longitudinal direction L by two radially running end portions 12 and 13 .
  • the laminated rotor core 6 has a first end side 14 illustrated on the left in FIG. 1 and has a second end side 15 illustrated on the right in FIG. 1 .
  • the filler body 5 is, by way of its end portions 12 and 13 , cast onto the end sides 14 and 15 of the laminated rotor core 6 in such a way that the individual laminations of the laminated rotor core 6 are pressed axially against one another by the end portions 12 and 13 (non-positive locking), but are at least axially held together (positive locking).
  • the end portions 12 and 13 can hold together or clamp the laminated rotor core 6 , that is to say they perform a kind of “clamp function” for the laminated rotor core 6 , which is held together in the longitudinal direction L by the end portions 12 and 13 .
  • the first shaft journal 3 is connected in positively locking fashion and rotationally conjointly to the filler body 5
  • the second shaft journal 4 is likewise connected in positively locking fashion and rotationally conjointly to the filler body 5 .
  • the connection between the shaft journals 3 and 4 respectively and the filler body 5 can be made for example by means of a screw connection (cf. for example FIGS. 2 and 3 ). Torques can be transmitted between the shaft journals 3 and 4 and the filler body 5 owing to the rotationally conjoint connection between the filler body 5 and the first shaft journal 3 on the one hand and also the second shaft journal 4 on the other hand. In particular, a rotational movement of the first shaft journal 3 and/or of the second shaft journal 4 can be transmitted to the filler body 5 .
  • Rotational movements and torques can also be transmitted from the filler body 5 to the laminated rotor core 6 owing to the rotationally conjoint connection between the filler body 5 and the laminated rotor core 6 (see above). Consequently, rotational movements and torques can be transmitted from the first shaft journal 3 and the second shaft journal 4 to the laminated rotor core 6 via the filler body 5 and vice versa.
  • the inner shell surface 9 of the filler body defines an axial cooling channel 16 for cooling air, which cooling channel connects opposite end sides of the filler body to one another. Furthermore, multiple cooling fins 17 are provided which are distributed substantially uniformly in a circumferential direction, which project radially inward from the inner shell surface 9 of the filler body 5 , and which extend in an axial direction between mutually opposite end sides of the filler body 5 .
  • the length of the cooling fins 17 is dimensioned such that a central region of the cooling channel 16 remains free or is not filled.
  • a conveying spiral 18 for cooling air may be arranged within the non-filled cooling channel.
  • the first shaft journal 3 has multiple air inlet openings 19 for the supply of air in an axial direction L
  • the second shaft journal 4 has multiple air outlet openings 20 for the discharge of air in the axial direction L.
  • a central shaft 21 of the conveying spiral 18 is mounted rotationally conjointly within the first shaft journal 3 and within the second shaft journal 4 , such that, as the shaft journals 3 and 4 rotate, the conveying spiral 18 also rotates, and cooling air is drawn in in the axial direction via the air inlet opening 19 , is conveyed through the axial cooling channel 16 by means of the conveying spiral 18 , and is discharged in the axial direction L through the outlet openings 20 .
  • FIGS. 2 to 4 show in detail how a rotor 1 incorporating the teachings herein (for example that according to FIG. 1 ) for a synchronous motor may be designed. It is accordingly possible for multiple fin-like cooling projections 17 to project radially inward from the inner shell surface 9 of the filler body 5 . Between the cooling projections 17 , there are arranged three fin-like fastening projections 22 which are arranged offset with respect to one another by 120° in the circumferential direction and which likewise project radially inward from the inner shell surface 9 of the filler body 5 and each have a threaded bore 23 .
  • the shaft journals 3 , 4 have in each case one fastening flange 24 , 25 with three bores 26 arranged offset with respect to one another by 120° in the circumferential direction.
  • the connecting flanges 24 , 25 of the shaft journals 3 , 4 are screwed together with the fin-like fastening projections 22 of the filler body 5 .
  • the laminated rotor core 6 may furthermore form receiving channels 28 within which permanent magnets 29 are received, wherein free spaces between the permanent magnets 29 and the receiving channels 28 are filled by the aluminum die-cast alloy of the filler body 5 such that the permanent magnets 29 are fixed within the receiving channels 28 by means of the filler body 5 .
  • each of the receiving channels 28 is connected by means of a connecting channel 30 to the rest of the filler body 5 .
  • the connecting channels 30 thus serve, during the casting of the filler body 5 onto the laminated rotor core 6 , for being able to conduct liquid aluminum die-cast alloy into the receiving channels 28 equipped with the permanent magnets 29 .
  • FIGS. 5 and 6 show a further rotor 1 incorporating the teachings herein, which is suitable for being used in an asynchronous motor.
  • the rotor 1 comprises a first short-circuiting ring 31 , a second short-circuiting ring 32 and multiple short-circuiting bars 33 .
  • the first short-circuiting ring 31 is composed of an aluminum die-cast alloy, which is cast onto a first end side of the laminated rotor core 6 .
  • the second short-circuiting ring 32 is likewise composed of an aluminum die-cast alloy, which is cast onto a second end side of the laminated rotor core 6 .
  • the multiple short-circuiting bars 33 are composed of an aluminum die-cast alloy, which is cast into axial grooves 34 of an outer shell surface 35 of the laminated rotor core 6 such that the short-circuiting bars 33 are connected in each case to the first short-circuiting ring 31 and to the second short-circuiting ring 32 .
  • the casting-on of the aluminum die-cast alloy may be performed such that the short-circuiting bars 33 and the short-circuiting rings 31 , 32 are not mechanically and electrically connected to the filler body 5 .
  • the aluminum die-cast alloy which is used for producing the short-circuiting bars 33 is furthermore, in the exemplary embodiment shown in FIGS. 5 and 6 , the same aluminum die-cast alloy as is used for producing the first short-circuiting ring 31 and the second short-circuiting ring 32 and for producing the filler body 5 .
  • First fan impeller blades 36 , 37 which are distributed in a circumferential direction are integrated into the shaft journals 3 , 4 .
  • First fan impeller blades 36 of the first shaft journal project from a first end side 38 of the first shaft journal 3 and project into the axial cooling channel 16 within the filler body 5 , wherein the first fan impeller blades 36 are, in a flow direction, arranged in each case downstream of one of the air inlet openings 19 .
  • Second fan impeller blades 37 of the second shaft journal 4 project from a second end side 39 of the second shaft journal 4 but do not project into the axial cooling channel 16 within the filler body 5 , and are instead oriented away from the axial cooling channel 16 , wherein the second fan impeller blades 37 are, in the flow direction, arranged in each case downstream of one of the air outlet openings 20 .
  • the fan impeller blades 36 also rotate, whereby cooling air is drawn in in an axial direction via the air inlet opening 19 by means of the first fan impeller blades 36 , is conveyed through the axial cooling channel 16 , and is discharged, or drawn out, through the outlet openings 20 in the axial direction L by means of the second fan impeller blades 37 .
  • FIGS. 7 and 8 show a further rotor 1 , which is suitable for being used in an asynchronous motor.
  • the rotor 1 as per FIGS. 7 and 8 differs from the rotor as per FIGS. 5 and 6 in particular by the design of the ventilation unit and of the cooling fins.
  • the ventilation unit comprises an axial fan impeller insert 40 with three blades 41 , wherein the axial fan impeller insert 40 is connected rotationally conjointly in positively locking fashion to the fin-like fastening projections 22 of the filler body 5 , wherein the axial fan impeller insert 40 is arranged within the axial cooling channel 16 .
  • an outer circumferential form of the axial fan impeller insert 40 corresponds to the fin-like fastening projections 22 of the filler body 5 , wherein no fin-like cooling fins project radially inward from the inner shell surface 9 of the filler body 5 (as shown by the exemplary embodiments in FIGS. 2 to 6 ).
  • FIG. 9 shows an electric machine 42 having a housing 43 and an air cooling circuit 44 , the conveying direction of which within the housing 43 is indicated by arrows.
  • a rotor shaft 2 is mounted rotatably within a first rolling bearing 45 and within a second rolling bearing 46 , wherein the rotor shaft comprises a first shaft journal 3 and a second shaft journal 4 .
  • That side of the housing 43 which is illustrated on the right in FIG. 9 is adjoined by an inverter 47 of the electric machine 42 .
  • the shaft journals 3 , 4 are connected rotationally conjointly to a filler body (cf. FIGS. 1 to 8 ) which is not shown in FIG. 9 , and which in turn is connected rotationally conjointly to a laminated rotor core 6 (not shown in FIG. 9 , in this regard cf. FIGS. 1 to 8 ).
  • a filler body cf. FIGS. 1 to 8
  • a laminated rotor core 6 not shown in FIG. 9 , in this regard cf. FIGS. 1 to 8 .
  • the laminated rotor core 6 is radially surrounded, with a small spacing, by a static stator 48 which comprises a laminated stator core 49 and which, on its two opposite end sides, has in each case one stator winding head 50 and 51 , which project in an axial direction beyond two mutually opposite axial end sides of the laminated rotor core 6 .
  • the stator 48 is surrounded with a spacing in a radial direction, over a full circumference, by the housing 43 .
  • the housing 43 and the stator 48 form, between them, an outer cooling channel 52 .
  • the outer cooling channel 52 extends onward to both sides, adjoining the laminated stator core 49 , between the stator winding heads 50 , 51 and the housing 43 .
  • the circulation cooling circuit 53 comprises a coolant line 54 outside the housing 43 and a liquid cooling channel 55 within the housing 43 .
  • a liquid coolant circulates within the circulation cooling circuit 53 .
  • a conveying pump 56 Arranged within the coolant line 54 is a conveying pump 56 which draws coolant from the liquid cooling channel 55 into the coolant line 54 and conveys said coolant via a heat exchanger 57 back into the liquid cooling channel 54 .
  • said heat exchanger is additionally flowed through by cooling water, which circulates in a main cooling circuit 58 and which is in turn cooled by a main water cooler 59 .
  • the rotor shaft 2 rotates, and with it also the laminated rotor core 6 and helical-spindle-shaped cooling channels 60 , which, in the exemplary embodiment shown in FIG. 9 , form the ventilation unit.
  • the ventilation unit it is possible—as shown in FIGS. 1 to 8 —for other ventilation units to be used (for example the conveying spiral 18 , the fan impeller blades 36 , 37 or the axial fan impeller insert 40 ).
  • a pressure side 61 and a suction side 62 form within the closed housing 43 of the electric machine 42 on mutually opposite end sides of the rotor 1 .
  • the cooling air cools in particular the laminated rotor core 6 from the inside, the rotor shaft 2 with its shaft journals 3 and 4 , the rolling bearings 45 and 46 , the stator winding heads 50 and 51 and the laminated stator core 49 .
  • the circulation cooling circuit 53 By means of the circulation cooling circuit 53 , the housing 43 is re-cooled directly, and the cooling air is re-cooled indirectly by means of the housing 43 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
US16/468,879 2016-12-15 2017-12-13 Electric machine and rotor with cooling channel Active 2038-07-22 US11205931B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102016225180.5 2016-12-15
DE102016225180.5A DE102016225180A1 (de) 2016-12-15 2016-12-15 Elektrische Maschine
PCT/EP2017/082526 WO2018108968A1 (fr) 2016-12-15 2017-12-13 Machine électrique

Publications (2)

Publication Number Publication Date
US20190356187A1 US20190356187A1 (en) 2019-11-21
US11205931B2 true US11205931B2 (en) 2021-12-21

Family

ID=60702746

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/468,879 Active 2038-07-22 US11205931B2 (en) 2016-12-15 2017-12-13 Electric machine and rotor with cooling channel

Country Status (5)

Country Link
US (1) US11205931B2 (fr)
EP (1) EP3555992B1 (fr)
CN (1) CN110036553B (fr)
DE (1) DE102016225180A1 (fr)
WO (1) WO2018108968A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016200423A1 (de) * 2016-01-15 2017-07-20 Continental Automotive Gmbh Elektrische Maschine
DE102016216027A1 (de) * 2016-08-25 2018-03-01 Continental Automotive Gmbh Kurzschlussläufer für eine Asynchronmaschine
DE102016225180A1 (de) 2016-12-15 2018-06-21 Continental Automotive Gmbh Elektrische Maschine
IT201700087339A1 (it) * 2017-07-28 2019-01-28 Hitachi Rail Italy S P A Gruppo motore elettrico per la trazione ferroviaria
FR3086130B1 (fr) * 2018-09-19 2020-10-16 Ge Energy Power Conversion Technology Ltd Rotor pour machine electrique asynchrone a arbre non traversant et machine electrique associee
DE102018216108A1 (de) * 2018-09-21 2020-03-26 Conti Temic Microelectronic Gmbh Rotor mit Füllanguss für eine elektrische Maschine
DE102018127501A1 (de) * 2018-11-05 2020-05-07 C. & E. Fein Gmbh EC-Motor für ein elektrisches Handwerkzeug sowie Verfahren zur Herstellung eines Rotors für einen EC-Motor
US11190093B2 (en) * 2018-12-07 2021-11-30 Pratt & Whitney Canada Corp. Electric machine systems with gears
EP3840189A1 (fr) 2019-12-20 2021-06-23 Volvo Car Corporation Rotor pour système de refroidissement d'air
CN112104119A (zh) * 2020-09-15 2020-12-18 华育昌(肇庆)智能科技研究有限公司 一种永磁同步电机高强度贴合的电机转子
CN112104163B (zh) * 2020-10-09 2021-11-16 浙江江宇电机有限公司 一种自散热电机
WO2022142974A1 (fr) * 2020-12-31 2022-07-07 广东美的制冷设备有限公司 Rotor de moteur et moteur
KR102544771B1 (ko) * 2021-03-10 2023-06-20 현대모비스 주식회사 로터 조립체 및 이를 포함하는 모터
EP4333267A1 (fr) 2022-08-29 2024-03-06 Walter Henrich GmbH Arbre de rotor modulaire pourvu de canaux de refroidissement intégrés

Citations (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764704A (en) 1954-06-10 1956-09-25 Alfred A Wolf Electric motor provided with cooling means
US2940393A (en) 1958-06-17 1960-06-14 North American Aviation Inc Spiral rotor electromagnetic pump
DE1162466B (de) 1961-07-31 1964-02-06 Licentia Gmbh Zusammenbau von geblechten Laeufern elektrischer Maschinen mit stirnseitig angesetzten Wellenstuempfen
JPS62296735A (ja) 1986-06-13 1987-12-24 Agency Of Ind Science & Technol 電動機の冷却装置
DE9408559U1 (de) 1993-06-21 1994-11-03 Siemens Ag Elektrische Maschine mit einem innengekühlten Läufer
DE19635196A1 (de) 1996-08-30 1998-03-12 Audi Ag Kühlanordnung für einen Elektromotor
EP0921623A2 (fr) 1997-11-24 1999-06-09 FÜRSTLICH HOHENZOLLERNSCHE WERKE LAUCHERTHAL GMBH & CO. Moteur électrique avec refroidissement du rotor
JP2001008413A (ja) * 1999-06-21 2001-01-12 Kamui Sangyo Kk ビルトイン形電動機の冷却方法
US20020195887A1 (en) * 2001-06-21 2002-12-26 Nissan Motor Co., Ltd. Cooling structure for rotating electric machine
EP1333561A2 (fr) 2002-01-30 2003-08-06 UQM Technologies, Inc. Dispositif de refroidissement de rotor
DE10226572A1 (de) 2002-06-14 2004-01-08 Robert Bosch Gmbh Verfahren zur Herstellung eines Rotors für einen Elektromotor sowie Rotor für einen Elektromotor
US20040217666A1 (en) * 2002-12-11 2004-11-04 Ballard Power Systems Corporation Rotor assembly of synchronous machine
US20050269893A1 (en) 2002-11-05 2005-12-08 Yasutaka Fujimoto Spiral linear motor
WO2007031381A1 (fr) 2005-09-16 2007-03-22 Siemens Aktiengesellschaft Machine electrique comportant des aimants permanents
EP2061134A1 (fr) 2007-11-16 2009-05-20 ebm-papst Mulfingen GmbH & Co. KG Rotor et moteur électrique avec un tel rotor
US7646119B2 (en) * 2003-08-01 2010-01-12 Siemens Aktiengesellschaft Electric machine with rotor cooling and corresponding cooling method
DE102008043367A1 (de) 2008-10-31 2010-05-06 Robert Bosch Gmbh Hybridantriebseinrichtung
CN101755376A (zh) 2007-07-19 2010-06-23 丰田自动车株式会社 旋转电机
DE102009012324A1 (de) 2009-03-09 2010-09-16 Siemens Aktiengesellschaft Elektrische Maschine mit Wärmeumlaufkühlung
US20100264760A1 (en) * 2009-04-21 2010-10-21 Nippon Soken, Inc. Electric rotating machine
DE102009025929A1 (de) 2009-06-05 2010-12-09 Ulrich Spevacek Läuferaufbau für eine permanentmagneterregte, rotierende elektrische Maschine
US20110024073A1 (en) * 2008-04-02 2011-02-03 Honda Motor Co., Ltd. Apparatus for manufacturing rotor for rotating electric machine
US20120133236A1 (en) * 2009-08-03 2012-05-31 Siemens Aktiengesellschaft Method for producing beveled cage rotor and beveled cage rotor
US20120326555A1 (en) * 2011-06-24 2012-12-27 Fanuc Corporation Electric motor having sleeve mounted to rotary shaft with high precision
DE102012110157A1 (de) 2012-10-24 2014-06-12 Thyssenkrupp Presta Teccenter Ag Rotor für einen Asynchronmotor
US20140333163A1 (en) * 2013-05-08 2014-11-13 Mitsubishi Electric Corporation Embedded permanent magnet rotary electric machine
CN104285361A (zh) 2012-03-08 2015-01-14 西门子公司 具有用于冷却电机的转子的电机
DE102015205724A1 (de) 2014-12-01 2016-06-02 Thyssenkrupp Presta Teccenter Ag Kühlsystem eines elektrischen Antriebes
CA2972225A1 (fr) 2014-12-24 2016-06-30 Hyosung Corporation Rotor
DE102015108817A1 (de) 2015-06-03 2016-12-08 Thyssenkrupp Ag Hohlwellenanordnung
US20170194835A1 (en) * 2015-12-31 2017-07-06 Kunihiro Miyake Wind-driven electricity generation device and rotor assembly thereof
WO2018108968A1 (fr) 2016-12-15 2018-06-21 Continental Automotive Gmbh Machine électrique
US20190103778A1 (en) * 2016-03-23 2019-04-04 Thyssenkrupp Presta Teccenter Ag[ Rotor segment of an electric machine
US20190214888A1 (en) * 2016-05-11 2019-07-11 Bombardier Transportation Gmbh A track-bound vehicle electric machine

Patent Citations (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764704A (en) 1954-06-10 1956-09-25 Alfred A Wolf Electric motor provided with cooling means
US2940393A (en) 1958-06-17 1960-06-14 North American Aviation Inc Spiral rotor electromagnetic pump
DE1162466B (de) 1961-07-31 1964-02-06 Licentia Gmbh Zusammenbau von geblechten Laeufern elektrischer Maschinen mit stirnseitig angesetzten Wellenstuempfen
JPS62296735A (ja) 1986-06-13 1987-12-24 Agency Of Ind Science & Technol 電動機の冷却装置
DE9408559U1 (de) 1993-06-21 1994-11-03 Siemens Ag Elektrische Maschine mit einem innengekühlten Läufer
DE19635196A1 (de) 1996-08-30 1998-03-12 Audi Ag Kühlanordnung für einen Elektromotor
EP0921623A2 (fr) 1997-11-24 1999-06-09 FÜRSTLICH HOHENZOLLERNSCHE WERKE LAUCHERTHAL GMBH & CO. Moteur électrique avec refroidissement du rotor
JP2001008413A (ja) * 1999-06-21 2001-01-12 Kamui Sangyo Kk ビルトイン形電動機の冷却方法
US20020195887A1 (en) * 2001-06-21 2002-12-26 Nissan Motor Co., Ltd. Cooling structure for rotating electric machine
EP1333561A2 (fr) 2002-01-30 2003-08-06 UQM Technologies, Inc. Dispositif de refroidissement de rotor
DE10226572A1 (de) 2002-06-14 2004-01-08 Robert Bosch Gmbh Verfahren zur Herstellung eines Rotors für einen Elektromotor sowie Rotor für einen Elektromotor
US20050269893A1 (en) 2002-11-05 2005-12-08 Yasutaka Fujimoto Spiral linear motor
US20040217666A1 (en) * 2002-12-11 2004-11-04 Ballard Power Systems Corporation Rotor assembly of synchronous machine
US7646119B2 (en) * 2003-08-01 2010-01-12 Siemens Aktiengesellschaft Electric machine with rotor cooling and corresponding cooling method
WO2007031381A1 (fr) 2005-09-16 2007-03-22 Siemens Aktiengesellschaft Machine electrique comportant des aimants permanents
US20100231066A1 (en) 2005-09-16 2010-09-16 Siemens Aktiengesellschaft Electrical machine with permanent magnets
CN101755376A (zh) 2007-07-19 2010-06-23 丰田自动车株式会社 旋转电机
US8242645B2 (en) 2007-07-19 2012-08-14 Toyota Jidosha Kabushiki Kaisha Rotating electric machine enabling cooling of a cooling target region
EP2061134A1 (fr) 2007-11-16 2009-05-20 ebm-papst Mulfingen GmbH & Co. KG Rotor et moteur électrique avec un tel rotor
US20110024073A1 (en) * 2008-04-02 2011-02-03 Honda Motor Co., Ltd. Apparatus for manufacturing rotor for rotating electric machine
DE102008043367A1 (de) 2008-10-31 2010-05-06 Robert Bosch Gmbh Hybridantriebseinrichtung
DE102009012324A1 (de) 2009-03-09 2010-09-16 Siemens Aktiengesellschaft Elektrische Maschine mit Wärmeumlaufkühlung
US20100264760A1 (en) * 2009-04-21 2010-10-21 Nippon Soken, Inc. Electric rotating machine
DE102009025929A1 (de) 2009-06-05 2010-12-09 Ulrich Spevacek Läuferaufbau für eine permanentmagneterregte, rotierende elektrische Maschine
US20120133236A1 (en) * 2009-08-03 2012-05-31 Siemens Aktiengesellschaft Method for producing beveled cage rotor and beveled cage rotor
US20120326555A1 (en) * 2011-06-24 2012-12-27 Fanuc Corporation Electric motor having sleeve mounted to rotary shaft with high precision
US9787164B2 (en) 2012-03-08 2017-10-10 Siemens Aktiengesellschaft Electrical machine having a rotor for cooling the electrical machine
CN104285361A (zh) 2012-03-08 2015-01-14 西门子公司 具有用于冷却电机的转子的电机
DE102012110157A1 (de) 2012-10-24 2014-06-12 Thyssenkrupp Presta Teccenter Ag Rotor für einen Asynchronmotor
US20140333163A1 (en) * 2013-05-08 2014-11-13 Mitsubishi Electric Corporation Embedded permanent magnet rotary electric machine
DE102015205724A1 (de) 2014-12-01 2016-06-02 Thyssenkrupp Presta Teccenter Ag Kühlsystem eines elektrischen Antriebes
CA2972225A1 (fr) 2014-12-24 2016-06-30 Hyosung Corporation Rotor
DE102015108817A1 (de) 2015-06-03 2016-12-08 Thyssenkrupp Ag Hohlwellenanordnung
US20180147937A1 (en) 2015-06-03 2018-05-31 Thyssenkrupp Presta Teccenter Ag Hollow shaft arrangement
US20170194835A1 (en) * 2015-12-31 2017-07-06 Kunihiro Miyake Wind-driven electricity generation device and rotor assembly thereof
US20190103778A1 (en) * 2016-03-23 2019-04-04 Thyssenkrupp Presta Teccenter Ag[ Rotor segment of an electric machine
US20190214888A1 (en) * 2016-05-11 2019-07-11 Bombardier Transportation Gmbh A track-bound vehicle electric machine
WO2018108968A1 (fr) 2016-12-15 2018-06-21 Continental Automotive Gmbh Machine électrique

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
Chinese Office Action, Application No. 201780072770.9, 6 pages, dated Aug. 3, 2020.
German Office Action, Application No. 10 2016 225 180.5, 7 pages, dated Nov. 28, 2017.
International Search Report and Written Opinion, Application No. PCT/EP2017/082526, 19 pages, dated Mar. 22, 2018.
Received search history from EIC 2800 searcher Angela Brooks on Jun. 25, 2021. (Year: 2021). *
Received STIC search report from EIC 2800 searcher Steve Chung on Feb. 25, 2021 (Year: 2021). *
See attached translated version of foreign patent JP-2001008413-A. (Year: 2001). *

Also Published As

Publication number Publication date
WO2018108968A1 (fr) 2018-06-21
EP3555992B1 (fr) 2020-10-14
CN110036553B (zh) 2021-07-16
US20190356187A1 (en) 2019-11-21
EP3555992A1 (fr) 2019-10-23
CN110036553A (zh) 2019-07-19
DE102016225180A1 (de) 2018-06-21

Similar Documents

Publication Publication Date Title
US11205931B2 (en) Electric machine and rotor with cooling channel
US11303174B2 (en) Rotor for an electric machine
US8901791B2 (en) Internal thermal management for motor driven machinery
US11018539B2 (en) Electric machine with helical cooling channels
EP3379701B1 (fr) Armature de support de rotor de moteur et moteur
US9660505B2 (en) Electrical machine with reduced windage loss
US11114924B2 (en) Squirrel-cage rotor for an asynchronous machine
US7160086B2 (en) Rotary machine cooling system
US20060066156A1 (en) Motor rotor cooling with rotation heat pipes
US11469644B2 (en) Multipart rotor shaft for an electric machine
JP6560033B2 (ja) 回転電機、並びに回転電機の冷却システム
US10298087B2 (en) Electric machine
CA2961893C (fr) Ventilateur externe et logement d'extremite d'entrainement destines a un alternateur refroidi a l'air
JP2017060319A (ja) 電動機の冷却構造。
CN213879562U (zh) 一种油冷电机的转子冷却回路
US10205372B2 (en) Motor-generator shaft with centrifugal fan blades
CN114337111B (zh) 一种内循环蒸发冷却电机冷却结构
CN114844296A (zh) 一种电驱动集成装置
US8079833B2 (en) Electric motor having a coaxially associated pump
CN214314874U (zh) 一种液冷电机
US11929643B2 (en) Compressor motor including active stator cooling
WO2024104867A1 (fr) Moteur, système d'assemblage d'entraînement électrique, véhicule et procédé de refroidissement de moteur
CN116455112A (zh) 永磁电机转子及定子端部绕组冷却结构及冷却系统

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

AS Assignment

Owner name: CPT GROUP GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FROEHLICH, HOLGER;FUKUMOTO, ISAO;SIGNING DATES FROM 20190403 TO 20190710;REEL/FRAME:050743/0667

AS Assignment

Owner name: VITESCO TECHNOLOGIES GMBH, GERMANY

Free format text: CHANGE OF NAME;ASSIGNOR:CPT GROUP GMBH;REEL/FRAME:052160/0431

Effective date: 20190919

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS

STPP Information on status: patent application and granting procedure in general

Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED

STCF Information on status: patent grant

Free format text: PATENTED CASE